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Name Chapter 01: Introduction
Description Question pool for Chapter 01: Introduction
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Question
A tentative explanation for a set of observations that can be tested by further experimentation is referred to as
a law
a theory
none of the above
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A concise verbal or mathematical statement of a relationship between phenomena that is always the same under the same conditions is referred to as
a law
a theory
none of the above
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Question
A unifying principle that explains a body of facts and relations is referred to as
a law
a theory
none of the above
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Question
Complete the following sentence A hypothesis is
Answer a tentative explanation for a set of observations that can be tested by further experimentation
a statement describing a relationship between phenomena that is always the same under the same conditions
a unifying principle that explains a body of facts and relations
a model used to visualize the invisible
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Question
Complete the following sentence A scientific law is
Answer a tentative explanation for a set of observations that can be tested by further experimentation
a statement describing a relationship between phenomena that is always the same under the same conditions
a unifying principle that explains a body of facts and relations
a model used to visualize the invisible
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Question
Complete the following sentence A theory is
Answer a tentative explanation for a set of observations that can be tested by further experimentation
a statement describing a relationship between phenomena that is always the same under the same conditions
a unifying principle that explains a body of facts and relations
a model used to visualize the invisible
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Question
Choose the response that includes all the items listed below that are pure substances
i orange juice ii steam iii ocean water iv oxygen v vegetable soup
ii, iv
i, iii, iv
iv only
Trang 2all of them are pure
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Which of the following is an example of a physical property?
Answer corrosiveness of sulfuric acid
toxicity of cyanide flammability of gasoline neutralization of stomach acid with an antacid lead becomes a liquid when heated to 601°C
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Question
Which one of the following is an example of a physical property?
Answer dynamite explodes
meat rots if it is not refrigerated gasoline burns
ice floats on top of liquid water
a silver platter tarnishes
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Which one of the following represents a physical change?
Answer water, when heated to 100°C, forms steam
bleach turns hair yellow sugar, when heated, becomes brown milk turns sour
apples, when exposed to air, turn brown
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All of the following are properties of sodium Which one is a physical property of sodium?
Answer It is a surface turns black when first exposed to air
It is a solid at 25°C and changes to a liquid when heated to 98°C
When placed in water it sizzles and a gas is formed
When placed in contact with chlorine it forms a compound that melts at 801°C
Sodium is never found as the pure metal in nature
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Question
All of the following are properties of tin Which one is a chemical property of tin?
Answer Tin can be hammered into a thin sheet
At –40°C a sheet of tin crumbles to a gray powder
Tin melts at 231.9°C
When a bar of tin is bent, it emits an audible “cry”
Tin erodes when added to hydrochloric acid, and a clear gas forms
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Which one of the following represents a chemical change?
Answer boiling water to form steam
burning a piece of coal heating lead until it melts mixing iron filings and sand at room temperature breaking glass
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Which of the following does not represent a chemical change?
Answer a freshly cut apple turns brown
milk turns sour on standing at room temperature when cooled to 0°C, liquid water becomes ice frying an egg
fermentation of sugar to alcohol
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Trang 3The SI prefixes nano and deci represent, respectively:
Answer 10– 9 and 10– 6
106 and 10– 3
103 and 10– 3
109 and 10– 6
10– 9 and 10– 1
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Question
The SI prefixes milli and mega represent, respectively:
Answer 106 and 10– 6
10– 3 and 106
103 and 10– 6
10– 3 and 109
10– 6 and 10– 3
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The SI prefixes kilo and centi represent, respectively:
Answer 103 and 10– 2
106 and 10– 1
10– 3 and 10– 2
10– 6 and 102
102 and 10– 3
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Question
A nanometer corresponds to:
Answer 10– 2 meters
10– 3 meters
10– 6 meters
10– 9 meters
10– 12 meters
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A microliter corresponds to:
Answer 10– 2 liters
10– 3 liters
10– 6 liters
10– 9 liters
10– 12 liters
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Question
6.0 km is how many micrometers?
Answer 6.0 × 106 µm
1.7 × 10– 7 µm 6.0 × 109 µm 1.7 × 10– 4 µm 6.0 × 103 µm
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2.4 km is how many millimeters?
2.4 × 104 mm 2.4 × 105 mm 2.4 × 106 mm 2.4 × 10– 5 mm
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Trang 4Multiple Choice 0 points Modify Remove
Question
How many milliliters is 0.005 L?
5 mL 0.50 mL 0.000005 mL
200 mL
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Question
Express 7,500 nm as picometers
75.0 pm
750 pm 7.5 × 106 pm 7.5 × 1012 pm
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The diameter of Earth is 12.7 Mm Express this diameter in centimeters
1.27 × 106 cm 1.27 × 107 cm 1.27 × 108 cm 1.27 × 109 cm
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In 1828, the diameter of the U.S dime was changed to approximately 18 mm What is this diameter when expressed in nanometers?
1.8 × 107 nm 1.8 × 101 nm 1.8 × 10– 5 nm 1.8 × 10– 10 nm
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Question
Which of the following represents the largest mass?
0.0010 kg 1.0 × 105 ng 2.0 × 102 cg 10.0 dg
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Question
Lead melts at 601.0°C What temperature is this in oF?
365°F 1,050°F 1,082°F 1,114°F
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Question
The element gallium melts at 29.8°C What temperature is this in °F?
–7.8°F +13.5°F +51.3°F +85.6°F
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Trang 5Many home freezers maintain a temperature of 0°F Express this temperature in °C
–18°C 0°C 18°C 57.6°C
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Question
The highest temperature ever recorded in Phoenix, Arizona, was 122°F Express this temperature in °C
64.4°C 67.8°C 162.0°C 219.6°C
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Question
Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C What is this temperature in °F?
–12.6°F –109°F –75.6°F none of them are within 2°F of the right answer
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Question
Liquid nitrogen boils at –195.8°C Express the boiling point of liquid nitrogen in kelvin
–77.4 K all temperatures are 0 K on the Kelvin scale 77.4 K
469.0 K
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Question
Liquid nitrogen boils at –195.8°C Express the boiling point of liquid nitrogen in °F
–352.4°F –320.4°F –140.8°F –76.8°F
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Question
Express the number 26.7 in scientific notation
Answer
2.67 × 10–2 2.67 × 10–1 2.67 × 101 2.67 × 102 26.7 is already written in scientific notation
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Question
Express the number 0.000053 in scientific notation
5.3 × 10-3 5.3 × 10-4 5.3 × 10-5 5.3 × 10-6
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Question
The number 1.050 × 109 has how many significant figures?
Trang 6Answer 2
3 4 9 13
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Question
How many significant figures are there in 1.3070 g?
5 4 3 2
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Question
Express the fraction 1/23 as a decimal to 4 significant figures
0.0435 0.04347 0.04348 0.04350
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Question
Express the fraction 1/51 in scientific notation to 3 significant figures
2.0 × 10–2.00 1.96 × 10–2 1.97 × 10–2 2.00 × 10–2
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Question
After carrying out the following operations, how many significant figures are appropriate to show in the result?
(13.7 + 0.027) ÷ 8.221
2 3 4 5
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Question
How many significant figures does the result of the following operation contain?
8.52010 × 7.9
3 4 5 6
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Question
How many significant figures does the result of the following sum contain?
8.5201 + 1.93
2 3 4 5
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Question
How many significant figures does the result of the following sum contain?
8.520 + 2.7
Trang 7Answer 1
2 3 4 5
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Question
How many significant figures does the difference 218.7201 – 218.63 contain?
2 3 5 7
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Question
Do the indicated arithmetic and give the answer to the correct number of significant figures
(1.5 × 10–4 × 61.3) + 2.01 =
2.0 2.019 2.02 2.019195
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Question
When 7.02oC is converted to the Fahrenheit scale, how many significant figures are there in the °F result?
2 3 4 5
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Question
How many cubic inches are in 1.00 liter?
155 in3
394 in3 1.64 × 104 in3 none of them
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Question
Convert 500 milliliters to quarts (1L = 1.06 qt)
0.472 qt 0.528 qt 4.72 × 105 qt 5.28 × 105 qt
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Question
A US barrel is 4.21 cubic feet Express this volume in liters
1.99 × 10–2 L 19.9 L
105 L
119 L
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Question
A barrel of oil contains 42.0 gallons How many liters is this? (1L = 1.06 qt)
Trang 8Answer 9.9 L
11 L
142 L
158 L
178 L
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Question
The average distance from Earth to the sun is 9.3 × 107 miles How many kilometers is this?
1.5 × 105 km 5.6 × 107 km 1.7 × 10 – 8 km 1.5 × 1011 km
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Question
What is the area, in square centimeters, of an 8.5 inch by 11 inch sheet of paper?
240 cm2
420 cm2 6.0 × 102 cm2 1.2 × 104 cm2
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Suppose a house has a floor area of 2,250 square feet What is this area in units of square centimeters?
2.09 × 106 cm2 5.02 × 104 cm2 6.86 × 104 cm2
101 cm2
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Question
What is the volume, in cubic inches, of a brick that is 4.0 in × 2.7 in × 8.0 in?
51 in3
78 in3
87 in3
150 in3
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What is the volume, in cubic centimeters, of a brick that is 4.0 in × 2.7 in × 8.0 in?
53 cm3
87 cm3 4.8 × 102 cm3 1.4 × 103 cm3
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Question
How many square kilometers are equivalent to 28.5 cm2?
Answer 2.85 × 10–9 km2
2.85 × 10–6 km2
285 km2 2.85 × 10–4 km2 none of these
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Trang 9How many cubic centimeters are there in exactly one cubic meter?
1 × 10–3 cm3
1 × 10–2 cm3
1 × 104 cm3
1 × 106 cm3
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Question
If a car has an EPA mileage rating of 30 miles per gallon, what is this rating in kilometers per liter? (1 L = 1.06 qt)
180 km/L
70 km/L
13 km/L
11 km/L
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Question
If the price of gasoline is $2.99 per U.S gallon, what is the cost per liter? (1 L = 1.06 qt)
$0.79/L $1.27/L $2.99/L $12.66/L
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Question
An aluminum beverage can contains 12.0 fluid ounces of liquid Express this volume in liters (1 fl oz = 29.6 mL)
Answer
4.07 × 10-2 L 0.355 L 0.407 L 2.46 L 3.55 × 102 L
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Question
157.2 × 106 troy oz of silver were used in the United States in 1980 How many gigagrams is this? (1 troy oz = 31.1 g)
Answer
4.89 × 109 Gg 4.89 Gg 5.05 × 10 – 9 Gg 3.12 Gg
5.05 × 10 – 3 Gg
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Question
A piece of metal with a mass of 611 g is placed into a graduated cylinder that contains 25.1 mL of water, raising the water level to 56.7 mL What is the density of the metal?
7.13 g/cm3 8.96 g/cm3 10.5 g/cm3 19.3 g/cm3
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Question
A piece of a metal alloy with a mass of 114 g was placed into a graduated cylinder that contained 25.0 mL of water, raising the water level to 42.5
mL What is the density of the metal?
0.592 g/cm3 2.68 g/cm3 6.51 g/cm3 7.25 g/cm3
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Trang 10A block of iron has a mass of 826 g What is the mass of a block of magnesium that has the same volume as the block of iron? The following densities at 25°C are provided: magnesium, 1.7 g/cm3 ; graphite, 1.8 g/cm3 ; iron, 7.9 g/cm3
3,800 g
830 g
180 g none of them are within 10 g of the right answer
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A block of iron has a mass of 483 g What is the mass of a block of graphite that has the same volume as the block of iron? The following densities
at 25°C are provided: magnesium, 1.7 g/cm3 ; graphite, 1.8 g/cm3 ; iron, 7.9 g/cm3
2120 g
6870 g
34 g none of them are within 10 g of the right answer
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Question
Calculate the mass of the air contained in a room that measures 2.50 m × 5.50 m × 3.00 m (density of air = 1.29 g/dm3 at 25°C)
32.0 kg 53.2 kg 53.2 g None of the above
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Question
The density of lead is 11.4 g/cm3 at 25°C Calculate the volume occupied by 25.0 g of lead
Answer
2.19 cm3 0.456 cm3
285 cm3 1.24 cm3 6.05 cm3
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Question
Iron has a density of 7.86 g/cm3 The volume occupied by 55.85 g of iron is
7.11 cm3 2.8 cm3
439 cm3 None of the above
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Iridium is essentially tied with osmium for the distinction of being called the “densest element” with a density of 22.5 g/cm3 What would be the mass in pounds of a 1.0 ft × 1.0 ft × 1.0 ft cube of iridium? (1 lb = 453.6 g)
5.2 lb 6.20 lb 1.4 × 10 3 lb 6.4 × 10 5 lb
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Bromine is a red liquid at 25°C Its density is 3.12 g/cm3 What is the volume of 28.1 g of liquid bromine?
0.111 cm3 9.01 cm3 28.1 cm3 None of the above
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Trang 11Multiple Choice 0 points Modify Remove
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The Hope diamond weighs 44.0 carats Determine the volume occupied by the diamond, given that its density is 3.5 g/cm3 at 20°C, and that 1 carat = 0.200 g
0.40 cm3 0.016 cm3
63 cm3
150 cm3
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Question
What is the volume of a 2.5 g block of metal if its density is 4.75 g/cm3?
Answer
0.53 cm3 1.9 cm3 2.5 cm3 4.75 cm3 11.9 cm3
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The density of mercury is 13.6 g/cm3 What is the mass in pounds of 1.0 gallons of mercury? (1 lb = 453.6 g; 1 gal = 3.785 L)
30 lb
51 lb
83 lb
110 lb
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The density of mercury is 13.6 g/cm3 What volume (in quarts) is occupied by 100 g of Hg? (1 L = 1.06 qt)
7.35 qt 7.79 qt 7.79 × 10 – 3 qt 1.44 × 10 – 4 qt
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The "escape velocity" from Earth (the speed required to escape Earth's gravity) is 2.5 × 104 miles per hour What is this speed in m/s? (1 mile =
1609 m)
6.9 m/s 4.2 × 102 m/s 1.1 × 104 m/s 4.0 × 107 m/s
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Which of the following speeds is the greatest? (1 mile = 1609 m)
2.0 × 105 mm/min
40 km/h 0.74 km/min
400 m/min
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Iron has a density of 7.87 g/cm3 What mass of iron would be required to cover a football playing surface of 120 yds × 60 yds to a depth of 1.0 mm?
(1 inch = 2.54 cm; 1 lb = 453.6 g)
6.4 × 104 lb 1.0 × 105 lb 4.7 × 107 lb